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Which of the following is a correct formula for sodium meta aluminate?

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in Chemistry – Class 11 by (148k points)
Which of the following is a correct formula for sodium meta aluminate?

(a) Na2AlO4

(b) Na2Al2O

(c) Na2Al2O4

(d) NaAl2O4

I have been asked this question in an international level competition.

My doubt stems from s-Block Elements in division s-Block Elements of Chemistry – Class 11

1 Answer

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Right answer is (c) Na2Al2O4

To elaborate: When aluminium reacts with alkali, that is when one mole of aluminium reacts with two moles of sodium hydroxide in presence of two moles of water two moles of sodium meta aluminate is formed along with three moles of hydrogen. The chemical formula for sodium meta aluminate is Na2Al2O4.

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